Ohmy, I love Santorini! Excellent colors, typical greek white and blue - I would try blurring the background but carefully, more around the building then above - you must try if that looks better or not. Personally I find the black part of the sky distracting, I´d like it blue too :-) But you did a great job with that!!

Hmmmm...this is a great shot...for critique I guess it depends what you wanted from the finished article. It works as a pattern, you have matched the blue of the sky with the blue of the dome and you have decreased cloud scale so you got very formed pattern clouds. I probably would have been more inclined to use a complimentary tone of blue for the sky and a little softer on the clouds. You could also have upped the haze levels a little to create a soft halo round the building...but in the end...as I say it depends what you wanted to achieve. Its a lovely picture anyway.

very good! u made a very clean and nice shot.

my only points:
1.clouds are having some distorted shape, i would say play a little in ur clouds settings until u get it looking better

2.italic isn't needed .. use roman weight for ur typeface. Italics are not used for that, read " when to use italic " in this article: http://en.wikipedia.org/wiki/Italic_type

3.ur personal brand ( signature ) is not readable.

tips:
1.this church design can use a calligraphy writing.

2.great u matched the colors between sky and the church, please make the sky looks detailed by playing more in the windlight editor.

Lovely sim! I love the detail, you have captured!

Blue...lol. Great shot. This is the place you asked me about before, I didnt remember the name.

this is an excellent picture in many ways I can say, and as Trixi said the harsh contrasts and sharp contours are a personal taste and you may have wanted to achieve something different but I think it works very well:) the only thing I would change about it is to blur the line on the horizon and smoothen the transition between the water and sky. On the plus side the shading of the rooftops is very smooth which is awesome:) and the way the cross is highlighted against the cloud in the center is quite ingenious though I am not certain if that was planned or an accident! *laughs:) in summary I can say this is a great image and very nearly flawless:)

I agree with Rhondita opinion......beside the fact that it is an amazing piece... I think that the transition beetwen the sky and sea would be made also different......

for example,
1) you could blur even more the line and make sky and sea becoming only one thing

2) otherwise you could make them more separated, using different tones and
colors for sky and sea

Personally, I'm more for the option 1)

Anyway, great piece and great subject!

I agree with the separation of sky and water. One or the other....right now it appears you want it to read water and sky...and for that you need a little separation haze at the horizon..or a slighly different water tone - or greater reflection. The treatment of white in this image is stellar - not over exposed with extremely smooth contours with shadowing - superb. Other things - I'm not a big fan of having the focal point dead center - in this case the cross - I would take a slightly different crop and have it slightly to the right...allowing the water to run down the entire left side to bottom of the image. You may play around with it and see what you get.

All in all - I totally love this hot as is would be proud to have taken it myself! You rock man!
Monroe